Broach mechanism



Sept. 11, 1928.

J. L. PERKINS r AL BROAQH MECHANISM Filed April 1927 INVEN'IORS.

' (l- W I ATTORNEY.

Patented Sept; 11, 1928.

UNITED MASSACHUSETTS, Assret'rons, TO rnnxjrns ,MA HINE ANDQEAR C MPANY,or

SPRINGFIELD, lvrli'ssnonv'snrtrs, A CORP oRA'rIoN or MASSACHUSETTS.

mma Manama,

'A pmaaan flied mil 7,

Unr invention r'elates' to improvements in mechanism for automaticallychangin the position s of reciprocating breaches, and cons'i stsgenerally of i'n'eans for holding hroaohes, means for attaching 'aidfirst-named means to a r'e'ciproeatingmemb'er in such a; manner thatmovement of the hroaches at rightangles to, the movement of said mernberi s permitted, means autcmat ipan t0 slntf, smd firt-hamed niean s' eaehtime said member approa ches either end of its travel, and means to hoidSaid broaiches against lateral inot e- Inent While either is passingthrough the cotting field, together with such other parts and Ineniheras my be hecesary or desirable order to render the rilechanisihfc'ornplete and serviceable in ever respect, an as: hereinafter setforth. H a H The pri' airy object of our invention is to provide comparatively V simple, H etrong', dfirable, and highly effic'ieht,.rn'e'chanism for automatio'ally shifting laterally, first in one andthen in the other direotion, two hr oache or two hii of'hroaches tolocate thetn altbr nately or one after the other in the gutting field orhroaohing jboeit ion, to the end that the c ultti or breaching epmti oni'spra ti- Cally continuous. that is to say, when the breaches or two 1of broaohe 'deeoend one of them makes a cut, and'tvhen they 'ase'endtheother makes a cut, and op anofnof broach ing is thereby ni'at'eriallyaceelerated, and the production of thernaohine eq ipp d, with ourmeeha'riism correspondingly ins i. ,o ,l,

,A Lhothe r ohject is to prodnce a mechanism oi ,thi s' eharatetwhich iS'poSitive and aocu} i i bvfifid a. a, 1; Other objeot and a dt'antageswill appear in the Coiirsddfthefdllowin d epriptioh.

This rnechanijsxn iLQdeSigned to be incorpob e th g m ch Ofthe t pesdisclosed. in Lotte/r5 Patent of the United States, No. 1,642,593. v n 1n n Ve att in the ohjeots and ie'eeur'e the advaninvention. themechanism tag'ee ofour 4 I v v r v lustrated he accompanylng drawmgs, 1n

Fi el which efhbddieis 'a volition owin the e; 'asseua:

top vietyof broaeh' Ineehanim' he same in connegtion yyith d" parte andnie. ere of:

praeti gal form of our 1927. swarm. 181,841.

a bro'aehing 'rn'aohine'; Fig. 2, a left-hand si die elet ationof saidmechanism and said'part'e' and members, with portions broken dut andbroken away; Fi 3,, a front elevat on of said rneohanisni, or 'enongh ofthe same to Show its disposition when the hroache are at the up'per endof their travel; la r view showing the disposition, 61 'said mechanismwhen said-,broaohes' are at the lower endof their travel; Fig. 5, aorh's edtion through portions of said rh'echa nisrri, taken on hnes 5-5,looking d'otirn, in Fig. 3,

and; Fig. 6, alright-hand side erevat'idn 51 said mechanism,

Similar reference char cters aesi hat' similar part-s throughol'itthe'eyeral vitir'. The old parts and 'rxi 'n'lh'ers Shawn in connectwnherewith as' necessary for a conijiilete understanding of the presentinvention oihprise column 1, a. r'arn2 arranged to reciprocate vertloally on gald eolu'rrin, and provrdedonone slde wlth a rack 3. and apinion 4 rntermeshl'ng mph sald rack, "said pinion being mounted on a'sihait 6. ,r'om anti snit- A ,[R-WP, able source of motlve power theshaftfi 1s caused to rotate,- and, throripfih the inedinhi of the pinion4 and the rack-3, to

ram 2 o'n'the 'eoliir'nn 1i Rever n means for the shaft 6'; and matinee;bring abbht' the operation of said reversing riie'ani each tiiri the mm2 arriv s atjeither and of its tiavel, are required, but these are nashcwn Beanie the natnr of the same i wen mideretbb'a; Inthis conncti n,hbwevr; ifer'efi'em be; had to Said patent.

Broaeh'es eueh a are'ns'e'd iii this art 'zi'r' usually made up insections arranged hd t6 end,- Sothat the separate fseetiiingbr maniaualbroaj che, to a1} intehts and pfirp ose's', feral b g br'oach, and theywilrliiei n he' considered; Two broaoh'e e of thi s h charaotei' arerepresented at 7 and 8, respeotifvelyathe' branc 7 beimzat the tartan- 1chebiroacri s the right. broach oaton the d Wn stroke and the broa qhg-cnts' on the strolge,

Aa i a h e 91.151 pmia for the broachee 7,, and 8'. holder inotlnted onthe fabe ofthe r m, 2 in the manfiephrin; after described; and. has-nthe 1o'r igitdg1inal center thereof a'slot lOto receive-the bodies ofthe broa'c'h f wl'liqh; bod

*I .;:i r, 111. eross' seamen 1s dovet 11 111 form.-

sides of the slot are undercut to receive the outermost inclined sidesof the bodies of the broaches 7 and 8, and a wedge bar 11 is received insaid slot with the inclined sides of said bar against the inclined innersides of said bodies. The depth of the slot 10 is greater than thethickness of the wedge bar 11, and screws 12 are employed to secure saidbar to the holder 9 and force the bodies of the broaches, by the actionof said bar thereon, tightly into place in said slot. Abutment blocks 133 are secured by screws or other means to the holder 9 above and belowthe breaches, said blocks being seated in the slot 10. Thus it is seenthat the two breaches are rigidly secured in parallel relation to beingin position to receive the holderliietween them with a sliding fit. At16 is represented an ordinary shim which may be used between one of thebars and the adjacent edge of the holder 9. The bars 15 serve the double7 purpose of retaining the holder 9 against the face of the ram 2, andof affording guides for said holder when the same is moved laterally.

In order to provide additional guiding means for the holder 9 in itslateral movement, and further insure the straight-line accuracy of suchmovement, one or more bars 17 are provided, there being three in thepresent example. These bars are let into the contiguous sides of the ram2 and the holder 9,

at different elevations between the bars 15.

Each bar 17 is secured by screws or other means to the ram 2.

From the foregoing it is clear that the holder 9, with the broaches 7and 8, can be moved both to the right and to the left on the ram 2, orat right-angles to the reciprocating movement of said ram which carriessaid breaches up and down in the direction of their length.

An upright 18 is located at the left of the ram 2, and has at the top arearwardlyextending flange 19 that is bolted at 20 to the column 1. Theupright 18 has its lower end bolted at 21 to a fixed part 22 of theframe of the machine. On the face of the upright 18 adjacent to thelongitudinal edges thereof are vertical guide ribs 23. Secured by screwsor other means to the face of the upright 18 adjacent to its upper endis a cam plate 24,

and similarly secured to said face of said upright adjacent to the lowerend thereof is a cam plate 25. The bottom end of the cam plate 24inclines from above downwardly and outwardly, and the upper end of the.cam

plate 25 inclines from below upwardly and inwardly. Secured by screws orother means to the face of the upright 18, between the ribs 23, is avertical cam bar 26. The inner edge of the cam bar 26 is in line withthe inner edge of the cam plate 24, and the outer edge of said bar is inline with the outer edge of the cam plate" 25; and the upper end'of thebar is parallel with the adjacent end of the upper plate, and the lowerend of the bar is parallel with the adjacent end of the lower plate. Thespaces between the cam bar 26 and the guide ribs 23 are equal to eachother in width; and the spaces between the adjacent ends of said bar andthe two cam plates are also equal toeach other.

Secured by belts or otherwise to the lefthand edge of the holder 9 is abracket 27. The bracket 27 extends out over the upright 18, and isprovided on the back side, at the left-hand edge, with two anti-frictionrolls 28, one directly above the other. The diameter of each roll 28 isapproximately equal to the width of any of the channels between the camplates 24 and 25, the cam bar 26, and

the ribs 23, and the length of a'line passing through the axes of therolls 28 and extending from the top of theperiphery of the upper rolltothe bottom of the periphery of the lower roll is approximately equal tothe width measured vertically of either of the spaces between adjacentends of said plates and said bar. I

lVith the parts disposed as in Fig. 3, the breach 7 is in the breachingposition or the cutting field, and with the parts disposed as in Fig. 4,the broach 8 is in said position or field.

Starting with the movable parts disposed as in Figs; 1, 2, 3, and 6, andassuming that the ram 2 is descending to make acut-with the broach 7,the complete operation of the mechanism at each cycle of the machineisdescribed as follows: 7

The rolls 28 initially are in the channel between the right-hand rib 23and the cam ill) plate 24, and said rolls remain in contact with saidrib until the ram approaches the lower end of its travel,-passing fromsaid channel into the channel between said rib an dthe cam bar 26. Bythe time the rolls 28 are in the intermediate channel the broach 7begins to make its cut. Directly after the cut is completed the lowerroll 28 encounters.

the inclined end of the cam plate 25 and is actuated thereby to theleft, this and the companion roll28 passing through the space betweenthe adjacent ends of said plate and the bar 26, and into the channelbetween said plate and left-hand rib 23. In moving to the left the rolls28 carry with them the bracket 27 and the holder 9, the latter slidingbetween the guide bars 15 and on the guide bars 17. The movement to'theleft imparted to the holder 9, when the rolls 28 pass from [vii AQQQAQOthe'channel between the right-.hand rib 23 and the bar 26' into thechannel between the lei'at-hand rib 23 an d the cam plate 25, isjustthe. right amount to position the broach 8 in the cutting field.

Upon the reversal the. ram 2 and the be ginning of the ascent thereof,the rolls 28 are moved up in contact with thelef-t-hand rib 23. into thechanncl between said rib and the bar 26. Beforethe rain; 2; arrives at.the upper end of its travel, the upper roll 28 en counters the inclinedend of the cam plate 2% and is carried thereby to. the. right, both thisand the companion roll pass between the adjacent ends of said plate andthe bar 26 into contact with the rightehandrib 23, and

then they move up. into the channel between said rib and said plate.This movement of the rolls 28 causes the bracket 27 and the holder 9 tobe actuated'to the right, between the guide barsl5 and on the guide bars17 as before, the required distance again to position the broach 7 inthe cutting field. Direct.- ly the ram 2 is reversed and the doublecycle of operation described above is repeated, another reversal of theram being involved in said double cycle. Thus it is seen that the broach7 is active at each down stroke of the ram, and the broach 8 at every upstroke of said ram;

While the broach 7 is making its cut, said breach is held securelyagainst lateral movement, because during that time the rolls 28 are inthe channel between the guide bar 26 and the right-hand rib 23, and,while the broach 8 is making its cut, said last-named breach is heldsecurely against lateral movement, because said rolls are then in thechannel between said bar and the left-hand rib 23.

By changing the wedge bar 11 and the abutments 13 broaches of differentlengths and sizes can be substituted for the broaches 7 and 8.

More or less change in the shape, size, construction, and arrangement ofsome or all of the parts of this mechanism may be made without departingfrom thespirit of our invention, or exceeding thescope of what isclaimed.

What we claim as our invention, and desire to secure by Letters Patent,is- V 1. In mechanism of the class described, a reciprocating memberhaving a fiat. face provided with a holderfor broaches adapted to cutalternately when moved in opposite directions, and means automaticallyto move said holder laterally on said face, first in one and then in theother direction, as said reciprocating member approaches the ends of itstravel. 2. The combination, in mechanism of the class described, with areciprocating member having a flat face, of a holder, for parallelbroaches, mounted for independent lateral movement on said face, andmeans automatirally to shift the position of said holder, each classdescribed, with a reciprocating member having a flat face, of a holder,for parallel broaches, mounted on said face for movementlaterally'thereon at right-angles to the recip- 4 rocating movement ofsaid member, and means auton'iatically to move said holder, atright-angles to the movement of saidinember, each time the latterapproaches either end of its travel, whereby said broaches arealternately positioned in the cutting field.

4. The combination, in mechanism of the class described, with areciprocating member provided with transverse guide members, of aholder, for broaches adapted to cut alternately as said first-namedmember reciprocates, slidingly arranged between said guide members, andautomatic means to cause said holder to be moved between said guidemembers each time said first-named member approaches either end of itstravel.

5. The combination, in mechanism of the class described, with areciprocating member provided with transverse guide members, of aholder, for broaches adapted to cut alternately as' said first-namedmember reciprocates, slidingly arranged between said guide members,automatic means to cause said holder to be moved between said guidemembers each time said first-named member approaches matic means to holdsaid .holder against movement between said guide members while eachbroach is making its cut.

6. The combination, in mechanism of the class described, with areciprocating member provided with lateral upper, under, andintermediate guide bars, of a holder, for

broaches adapted to cut'alternately as said member reciprocates, insliding engagement with said bars, and means to actuate said holder onsaid bars, first in one direction and then in the other direction, assaid reciprocating member approaches the ends of its travel.

either end of its travel, and auto 7. The combination, in mechanism. ofthe class described, with a reciprocating member provided withlateralguide means, and members forming channels parallel with the pathof said reciprocating member, and forming communicating passages betweensaid channels at and adjacent to the ends thereof, of a holder, forbroaches adapted to cut altern ately as said first-named memberreciprocates, carried by said guide means, and having a part'adapted toengage said channeland passage-forming members and travel insaidchannels and through said passages.

8. The combination, in mechanism of the class described, with areciprocating member provided with lateral guide means, channelandpassage-forming ribs, cam plates,

right having parallel ribs and provided at the top and bottom With camplates and With a cam bar between said ribs and between said plates,said cam plates being in offset rela- 1,eee,140

tionship, and With said ribs and bar forming parallel channels Whichcommunicate with each other above and below said bar of a holder, forbroaches adapted to cut alternately as said member reciprocates, carriedby said guide means, and provided wlt-h a bracket havin a aro'ect ionada ted to travel in said channels and through the communicatingpassages, as said member reciprocates, and

thereby to move said holder laterally to position first one broach andthen the other in the cutting field, and to hold said holder againstlateral movement While either breach is passing through said field.

JULIAN L. PERKINS. I-IIRAM I). CROFT.

